Differential Fluid 101: What It Does and When to Replace It
Discover what a car differential does, how differential fluid protects your vehicle, and signs your ride may need professional differential fluid service.
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Your vehicle’s drivetrain is what transfers power from the engine to the wheels—so keeping it in top shape is essential for smooth, reliable driving. From fluid changes to joint and shaft repairs, Firestone Complete Auto Care offers expert drivetrain services designed to help prevent wear and extend your vehicle’s performance.
If your vehicle has a delayed response when being put in drive or reverse, or if it doesn’t engage at all when in drive or reverse, you could be experiencing transmission issues. This can indicate a problem with the gear selector linkage, a mechanical issue with the transmission if it won’t go into gear, or possibly the transmission fluid.
Many things can cause vibration in your vehicle, but vibrations along with other drivetrain problem symptoms could mean a bad or failing differential, a failing C/V Axle, or worn-out U-joints.
If your vehicle is slipping in and out of gear while you’re driving, it could be an indication that your transmission is slipping and there’s a greater malfunction in your drivetrain system.
Strange noises could indicate a bad CV-joint, driveshaft damage, or a failing transmission. If you notice clicking noises while turning, it could be that your CV-joints need replacement or repair. Bring your vehicle to your local Firestone Complete Auto Care to confirm. Driveshaft damage will typically make a loud clunking noise while shifting.
If you’re seeing red fluids on the pavement after you park (color may vary by manufacturer), it could be an indication that there’s a leak in your transmission that needs repair. If your transmission runs without adequate fluid, it can overheat and fail.
If you pull the transmission dipstick and the fluid smells burnt or there's a burning smell coming from the clutch on a manual transmission, your transmission or clutch may be overheating. It could be that your transmission fluid is low or that the fluid’s lubricating abilities have diminished with age. Without immediate maintenance, this problem could lead to a transmission breakdown.
Your drivetrain is loaded with sensors that can signal a problem to your indicator lights —sometimes well before you notice an issue in your driving experience. If your indicator lights are turning on, it’s always a good idea to have your vehicle checked out at your nearest Firestone Complete Auto Care.
A vehicle’s drivetrain is the system that transfers power from the engine to the wheels. It includes components that help deliver smooth movement and control, such as axles, CV joints, driveshaft parts, differentials, and related fluids, depending on the vehicle.
Firestone Complete Auto Care offers drivetrain services such as:
Differential fluid service: Replacing old differential fluid to restore lubrication and help maximize gear protection.
Axle, U-Joints and CV joint inspection/repair: Repair and replacement of worn axles, U-joints or CV joints.
Driveshaft service: Check for signs of wear, imbalance, and damage, and repair as needed.
Schedule a drivetrain inspection appointment at Firestone Complete Auto Care to get a technician to inspect your vehicle and recommend the right service.
Signs of drivetrain problems can include unusual vibrations, shaking while in gear, clunking, clicking, humming, or whining sounds, difficulty engaging in drive or reverse, slipping gears, leaking or low transmission fluid, burning smells, or warning lights such as ABS, traction control, brake, or check engine lights. The cause of these symptoms may involve the drivetrain, transmission, CV joint, differential, and related components. Schedule a service appointment at Firestone Complete Auto Care so a technician can diagnose the issue.
Vibrations, shaking, clicking, clunking, humming, or whining can indicate drivetrain issues such as worn CV joints, a failing CV axle, driveshaft damage, U-joint wear, differential issues, or transmission-related problems. Clicking while turning can be a sign that CV joints may need inspection or repair, while clunking during shifting can be associated with driveshaft or worn engine or transmission mount concerns. Schedule a service appointment at Firestone Complete Auto Care so a technician can inspect your vehicle to confirm the cause.
If you notice vibrations, unusual sounds, delayed gear engagement, slipping gears, fluid leaks, burning smells, or dashboard warning lights, find a Firestone Complete Auto Care near you to schedule a drivetrain service appointment. A technician may also identify drivetrain wear during routine maintenance and recommend repair services.
Discover what a car differential does, how differential fluid protects your vehicle, and signs your ride may need professional differential fluid service.
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